CN1303457C - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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Publication number
CN1303457C
CN1303457C CNB2004100294919A CN200410029491A CN1303457C CN 1303457 C CN1303457 C CN 1303457C CN B2004100294919 A CNB2004100294919 A CN B2004100294919A CN 200410029491 A CN200410029491 A CN 200410029491A CN 1303457 C CN1303457 C CN 1303457C
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CN
China
Prior art keywords
light
liquid crystal
pixel
mentioned
light source
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB2004100294919A
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Chinese (zh)
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CN1532598A (en
Inventor
仲吉良彰
柳川和彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Liquid Crystal Display Co Ltd
Japan Display Inc
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Hitachi Displays Ltd
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Publication of CN1532598A publication Critical patent/CN1532598A/en
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Publication of CN1303457C publication Critical patent/CN1303457C/en
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0456—Pixel structures with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0235—Field-sequential colour display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • G09G2310/063—Waveforms for resetting the whole screen at once
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source

Abstract

A liquid crystal display device exhibits high reliability and is capable of miniaturization by eliminating a mechanical operating mechanism. At least a light guide plate which guides light from a light source, a liquid crystal display panel, an optical medium which changes over transmission and reflection of light, color filters and a reflector are sequentially arranged from the viewer side. The color of the light from the light source are sequentially changed over to provide three primary colors, and this light passes through the liquid crystal display panel and is reflected toward the viewer side by the optical medium. The color filters are constituted for respective primary colors and are arranged to face at least three pixels which are disposed close to each other. The reflector reflects an ambient light which passes through the light guide plate, liquid crystal display panel, optical medium and color filters to the viewer side.

Description

Liquid crystal indicator
Technical field
The present invention relates to liquid crystal indicator, relate to the color liquid crystal display arrangement that shows in so-called field-sequential method (field sequential) mode.
Background technology
The color liquid crystal display arrangement of so-called field-sequential method mode is that, green for example red through the light of each pixel and blueness are switched in time successively, and according to it regularly, provides red with, green picture signal with, blue usefulness to each pixel.
In view of the above, though the observer of color liquid crystal display arrangement receives with the time-division state carrying redness, green and each blue light of each Pixel Information, can come perception with state with its colour mixture.
And, such color liquid crystal display arrangement needs to shine the light source of each red, green and blue light, in the driving that for example stops this light source, when driving this color liquid crystal display arrangement, become and to carry out the colored structure that shows with ambient lights such as sunshine (white light).
, when such color liquid crystal display arrangement is used as the display device of for example mobile phone etc., during at standby mode or in outdoor long-time use, wish very much to use ambient light (white light) to carry out colour demonstration.
As the device that can satisfy such demand, the known outer setting color filter that has at display panels (liquid crystal cell (cell)), by it is mechanically moved with respect to each pixel, carry out colored device shown (with reference to TOHKEMY 2002-328355 communique) with white ambient light.
, such liquid crystal indicator so lack reliability, in addition, makes its mechanical hook-up that carries out this action because comprise because comprise the mechanical action of color filter, so have boundary in the miniaturization of device self, this all is unfavorable.
Summary of the invention
The present invention is based on this situation and finishes, and its purpose is there is not mechanical motion mechanism, in view of the above, provides the reliability height, and can realize the liquid crystal indicator of miniaturization.
If the summary of representational part is then as described below in the disclosed invention of simple declaration the application.
Scheme 1:
Liquid crystal indicator of the present invention is characterised in that: begin to dispose at least successively light guide plate, display panels, the optical medium that pass through and reflect of switches light, color filter, the reflecting plate of guiding from observer's one side from the light of light source,
Above-mentioned light from light source is switched successively is responsible for the trichromatic of all kinds of color, by behind the above-mentioned display panels, reflexes to observer's one side by above-mentioned optical medium,
And above-mentioned color filter is made of color filter trichromatic of all kinds relative respectively with 3 pixels that adjoin each other of display panels, that be responsible for color at least,
Said reflection plate makes the ambient light that passes through via above-mentioned light guide plate, display panels, optical medium and color filter reflex to observer's one side.
Scheme 2:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 1, it is characterized in that: above-mentioned color filter is formed on the described reflecting plate face.
Scheme 3:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 1, it is characterized in that: have display control circuit, judge the Kai Heguan of above-mentioned light source by this display control circuit; When this light source is opened,, each pixel is provided the picture signal of corresponding color according to switching from the light of all kinds of this light source; When above-mentioned light source closes, provide picture signal respectively corresponding to the color of the color of the color filter of relative configuration with it at least 3 that adjoin each other above-mentioned pixels.
Scheme 4:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 3, it is characterized in that: when described light source is opened, carry out data between get, low when resolution is closed than light source.
Scheme 5:
Liquid crystal indicator of the present invention is characterised in that: from observer's one side begin to dispose at least successively guiding from the optical medium that passes through and reflect of the light guide plate of the light of light source, display panels, switches light, be responsible for color filter, the reflecting plate trichromatic of all kinds of color
Above-mentioned light source is by the light that sends from it that switches successively trichromatic of all kinds of being responsible for color,
Above-mentioned display panels is divided into 3 the of all kinds relative pixel regions with above-mentioned color filter in its each pixel,
And having to each pixel provides the parts of picture signal simultaneously and the parts of black shows signal is provided independently to each pixel region.
Scheme 6:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 5, it is characterized in that: provide picture signal via image signal line to each pixel region, black shows signal provides via this image signal line.
Scheme 7:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 5, it is characterized in that: when the time from above-mentioned light source luminescent, do not provide black shows signal to each pixel region, when from above-mentioned light source when not luminous, after providing picture signal to each pixel region, other residual pixel zones beyond the corresponding pixel region of the color of being responsible for this picture signal provide black shows signal.
Scheme 8:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 5, it is characterized in that: provide picture signal via image signal line to each pixel region, provide black shows signal via the signal wire that differently is provided with this image signal line.
Scheme 9:
Liquid crystal indicator of the present invention is characterised in that: from observer's one side begin to dispose at least successively guiding from the optical medium that passes through and reflect of the light guide plate of the light of light source, display panels, switches light, be responsible for color filter, the reflecting plate trichromatic of all kinds of color
Above-mentioned light source is by the light that sends from it that switches successively trichromatic of all kinds of being responsible for color,
Above-mentioned display panels is divided into 3 the of all kinds relative pixel regions with above-mentioned color filter in its each pixel,
Respectively via because of the 1st thin film transistor (TFT) that drives that provides from the sweep signal of the 1st signal line, via because of the 2nd thin film transistor (TFT) that drives that provides from the sweep signal of the 2nd signal line, via because of the 3rd thin film transistor (TFT) that drives that provides, provide picture signal from the same drain signal wire to each pixel electrodes of these pixel regions from the sweep signal of the 3rd signal line.
Scheme 10:
Liquid crystal indicator of the present invention is a prerequisite with the structure of described scheme 9, it is characterized in that: comprise black shows signal in the above-mentioned picture signal, switch successively and carry out the demonstration separately of each pixel region, and when these switch, carry out black demonstration based on this black shows signal.
In addition, the present invention is not limited to above structure, in the scope that does not break away from technological thought of the present invention, can carry out various changes.
Description of drawings
Figure 1A～1C is the structural drawing of an embodiment of expression liquid crystal indicator of the present invention.
Fig. 2 A～2B is the figure of the light path in the use of the reflective-mode of the liquid crystal indicator of expression shown in Figure 1A～1C and transmission mode.
Fig. 3 A～3E is the structural drawing of an embodiment of the relation of the pixel of the liquid crystal indicator of expression shown in Figure 1A～1C and painted reflecting plate.
Fig. 4 A～4B is the key diagram of an embodiment of the reflective-mode of the liquid crystal indicator of expression shown in Figure 1A～1C and the demonstration situation in the transmission mode.
Fig. 5 A～5B is the structural drawing of other embodiment of the relation of the pixel of the liquid crystal indicator of expression shown in Figure 1A～1C and painted reflecting plate.
Fig. 6 is the structural drawing of other embodiment of expression liquid crystal indicator of the present invention.
Fig. 7 A～7D is the structural drawing of other embodiment of expression liquid crystal indicator of the present invention.
Fig. 8 A～8G is the structural drawing of other embodiment of expression liquid crystal indicator of the present invention.
Fig. 9 A～9C is the structural drawing of other embodiment of expression liquid crystal indicator of the present invention.
Figure 10 A～10B is the driving method of the liquid crystal indicator shown in presentation graphs 9A～9C
The sequential chart of embodiment.
Figure 11 A～11B be expression liquid crystal indicator of the present invention other embodiment structural drawing and represent the sequential chart of the embodiment of its driving method.
Figure 12 A～12D be expression liquid crystal indicator of the present invention other embodiment structural drawing and represent the sequential chart of the embodiment of its driving method.
Figure 13 A～13B is the key diagram of embodiment that the equipment of liquid crystal indicator of the present invention has been installed in expression.
Embodiment
Below, with reference to the embodiment of description of drawings liquid crystal indicator of the present invention.
Embodiment 1
At first, Figure 1A～1C is the structural drawing of an embodiment of expression liquid crystal indicator of the present invention, and Figure 1A is a planimetric map, and Figure 1B is the cut-open view of the b-b line of Figure 1A, and expression has added the figure that the parts of representing it is provided the circuit of signal.
Display panels PNL is arranged in Figure 1B.The following formation of this display panels PNL: being encapsulation, having at the propagation direction of this liquid crystal and to be configured to rectangular a plurality of pixels via the right transparency carrier of liquid crystal phase.
This display panels PNL is an active array type for example, constitutes as so-called transmission-type.Here, so-called transmission-type is meant the structure that does not have reflecting plate in inside, is made of from the pixel that the face of this display panels PNL is transmitted to another face luminous energy.In addition, this display panels PNL does not have color filter in inside.
In addition, the signal to this display panels PNL provides the driving circuit DRV1 of free display control circuit TCON driving shows.
On the face of observer's one side of this display panels PNL, dispose light guide plate GLB via polaroid POL.Polaroid POL and light guide plate GLB are configured with covering liquid crystal display part at least.
Shown in Figure 1A, dispose for example red light emitting diodes RD, green LED GD, blue LED BD at the side wall surface of light guide plate GLB, these diodes are by lighting control device LCA and luminous.Incide inside from the light of each diode RD, GD, BD from the side wall surface of light guide plate GLB, shine above-mentioned display panels PNL side.
Each diode RD, GD, BD are according to the signal of the lighting control device LCA that comes free above-mentioned display control circuit TCON to drive and luminous.At this moment, shown in Fig. 1 C,,, luminous repeatedly, extinguish according to for example order of red light emitting diodes RD, green LED GD, blue LED BD along with the process of time.Among Fig. 1 C, its transverse axis is time t, and the longitudinal axis is brightness B.
At the back side of above-mentioned display panels PNL, cover at least this display panels PNL liquid crystal display part dispose optical medium LM.This optical medium LM has the function of reflecting plate and transmittance plate by switching.That is, this optical medium LM is, when display panels PNL is used as light transmissive mode (when turning off light source LT), has the function as the transmittance plate, when using as light reflective-mode (when opening light source LT), has the function as reflecting plate.
The switching of above-mentioned each function of optical medium LM is carried out according to the signal of the driving circuit DRV2 that comes free described display control circuit TCON to drive.
At the back side of this optical medium LM, cover at least this display panels PNL liquid crystal display part disposing painted reflecting plate CRF.This painted reflecting plate CRF constitutes, and has color filter on the surface of for example relative with this optical medium LM reflecting plate, and the color of this color filter constitutes by red, green, blue is of all kinds, forms accordingly with each pixel of this display panels PNL.
Fig. 2 A～2B is the key diagram of the action of the above-mentioned liquid crystal indicator of expression, and Fig. 2 A is illustrated in the situation of using under the reflective-mode, and Fig. 2 B is illustrated in the situation of using under the transmission mode.
At first, under the reflective-mode of Fig. 2 A, each pixel of display panels PNL is controlled the light transmission of liquid crystal according to view data, provide from the light of each diode RD, GD, BD to become out, and optical medium LM is set at and has the light reflection function.
That is, via light guide plate GLB, incide display panels PNL successively repeatedly from the light of red diode RD, green diode GD, blue diode BD, these light incide described optical medium LM by the liquid crystal in the display panels PNL.In addition, red to display panels PNL input according to regularly with, green view data with, blue usefulness from the incident of the light of each diode, drive each pixel according to this.
The light that incides above-mentioned optical medium LM is by this optical medium LM reflection, once more by the liquid crystal in the display panels PNL, by light guide plate GLB, to observer's one side incident.
About each pixel, receive to see through the light of the red, green, blue of these liquid crystal, light at this moment comprises red with, green each Pixel Information with, blue usefulness respectively, thus the observer can perception with their colour mixtures color pixel.
In addition, in the transmission mode of Fig. 2 B, each pixel of display panels PNL is according to the light transmission of view data control liquid crystal, provide from the light of each diode RD, GD, BD to become the pass, and optical medium LM is set at and has the transmittance function.
That is, by light guide plate GLB, for example the ambient light of sun etc. is incided display panels PNL, and this light is incided optical medium LM by the liquid crystal in the display panels PNL.At this moment, redness is used, green is used, the view data of blue usefulness is transfused to 3 pixels of the adjacency of display panels PNL, and above-mentioned ambient light is by the liquid crystal of these each pixels.
The light that incides above-mentioned optical medium LM is by this optical medium LM, by painted reflecting plate CRF reflection.At this moment, in painted reflecting plate CRF, with the red pixel with, green view data with, blue usefulness of input among the display panels PNL respectively relatively, be formed with red color filter, green color filter, blue color filter.
And the light that is reflected by this painted reflecting plate CRF passes through optical medium LM, display panels PNL, light guide plate GLB to observer's one side incident.
About 3 pixels of adjacency, receive the light of red, green, blue, light at this moment comprises red with, green each Pixel Information with, blue usefulness respectively, thus the observer can perception color pixel after their colour mixtures.
As shown in the above description, display panels PNL with the unit picture element of a pixel as colour demonstration usefulness, when using with transmission mode, shows the unit picture element of usefulness at least as colour with three pixels when using it with reflective-mode.
Fig. 3 A～3E is the figure of relation of the color filter CF of the pixel of expression display panels PNL and painted reflecting plate CRF.
At first, Fig. 3 A be in the pixel of expression display panels PNL part, be configured in the optical medium LM at the back side of this display panels PNL and the cut-open view of painted reflecting plate CRF successively.
Display panels PNL is so that transparency carrier SUB1, the SUB2 of configuration are encapsulation relatively via liquid crystal LQ, on the face of the liquid crystal side of this transparency carrier SUB2, be formed with the belt-shaped transparent opposite electrode CT that x direction is in the drawings extended, is arranged side by side in the z direction, on the face of the liquid crystal side of this transparency carrier SUB1, be formed with the belt-shaped transparent pixel electrode PX that z direction is in the drawings extended, is arranged side by side in the x direction.
The overlapping cross section of pixel electrode PX and opposite electrode CT constitutes a pixel, by the electric field that produces in this part, can control the light transmission of the liquid crystal of this part.
In addition, the structure as the pixel of display panels PNL is not limited thereto, and also can be other structures.
In addition, in the present embodiment, optical medium LM is formed with electrode TM1, TM2 respectively at the surface and the back side of material layer PDLC, and by apply voltage on these electrodes TM1, TM2, himself plays a role as reflecting plate or transmittance plate.
When this display panels of y direction unilateral observation PNL from figure, each pixel PIX is configured to rectangular shown in Fig. 3 B.
At this moment, if this display panels PNL is used as reflective-mode (light source LT opens), then shown in Fig. 3 C, each pixel PIX shows the unit picture element (part that with dashed lines surrounds among the figure) of usefulness as colour.This is to pass through each pixel PIX successively repeatedly because of the light from above-mentioned diode RD, GD, BD.
In addition, when this display panels PNL when using, shown in Fig. 3 D, is shown the unit picture element of usefulness as transmission mode (light source LT is for closing) as colour with for example 9 the pixel PIX (part that with dashed lines surrounds among the figure) that adjoin each other.
These 9 pixel PIX are 3 * 3 configuration, wherein in the drawings the left side, 3 pixel PIX being arranged side by side of z direction are responsible for redness in the drawings, central in the drawings, 3 pixel PIX being arranged side by side of z direction are responsible for green in the drawings, right side in the drawings, 3 pixel PIX being arranged side by side of z direction are responsible for blueness in the drawings.
At this moment, the so-called pixel PIX that is responsible for redness, the pixel PIX that the expression red light is passed through on the face of the painted reflecting plate CRF relative with this part, shown in Fig. 3 E, is formed with red color filter FIL.Equally, on the face of the painted reflecting plate CRF relative, be formed with green color filter FIL, on the face of the painted reflecting plate CRF relative, be formed with blue color filter FIL with responsible blue pixels PIX with being responsible for green pixel PIX.
By such structure, when light source (reflective-mode) when opening, the colored unit picture element that shows is corresponding with a pixel, when light source closes (transmission mode), the colored unit picture element that shows is corresponding with a plurality of (at least 3 pixels) pixel, can realize that the colour that is undertaken by ambient light shows.At this moment, by the ON/OFF of display control circuit TCON control light source LT, so can easily judge by this display control circuit TCON.
Fig. 4 A～4B as mentioned above, according to the state of opening, the off status of light source LT, the pixel count difference of the colored unit picture element that shows, so the data number can close with light source the time is a benchmark, the data number when getting light source and opening.
Fig. 4 A is the figure of the part of the demonstration situation of expression light source when opening, and the pixel (A1, A2, A3, A4) of the center of expression in 3 * 3 pixels that adjoin each other provides data.That is, carry out data between get so that reduce resolution, and can show original information.At this moment, be not only and get between simple, can certainly be used to make the interpolation arithmetic of the connection smoothness of data.
The figure of the part of the demonstration situation when Fig. 4 B is expression light source pass is the figure corresponding with Fig. 4 A.In 3 * 3 pixels that adjoin each other of the unit picture element that shows usefulness as colour, each pixel of being responsible for same color shows with identical data, in view of the above, carries out special-purpose picture (standby picture) and shows.
When such formation, under the state of opening and off status of light source LT, the resolution of demonstration changes, so show the poor of picture element in order to reduce these, wishes that the resolution of original pixel is higher.As the Pixel Dimensions under this situation, wish that 1 pixel is less than or equal to 150 μ m, particularly wish to be less than or equal to 100 μ m.This is because original Pixel Dimensions is less, and then when light source LT closed, the size of the unit picture element of colored demonstration usefulness was also not too large, can avoid the observer to produce the impression that resolution worsens.In addition because when 1 pixel is less than or equal to 100 μ m, the display area size when amplify showing become present be equivalent to so-called 15 " size of XGA, so can suppress to make the observer to produce the impression of resolution deterioration.Thus, as resolution,, if possible, wish more than or equal to VGA more than or equal to 1/4VGA.
In addition, in Fig. 4 B, the colour that is made of 3 * 3 pixels shows that the unit picture element of usefulness is to be responsible for redness with 3 pixels on its right side, 3 pixels with the center are responsible for green, be responsible for blue with 3 pixels in left side, but, certainly change these arrangements, for example shown in Fig. 5 A, with 3 pixels on right side, from beginning to be responsible for red, blueness, green, 3 pixels with the center, from beginning to be responsible for green, redness, blue,, responsible blue, green, red from beginning with 3 pixels in left side.Be formed at each color filter FIL on the painted reflecting plate CRF shown in Fig. 4 B under this situation,, be formed at relative place according to above-mentioned be responsible for of all kinds.In addition, in Fig. 4 A, be to represent a pixel with 3 * 3 pixels, but also can be with RGB three pixels of horizontal delegation represent a pixel between access method.
At this moment, in colour showed the unit picture element of usefulness, red, green, blue allocation ratio was even, so be difficult to the separation of visually distinguishing red, green, blue, regarded the whole luminous of this unit picture element as, thus the picture element raising.In addition, at this moment need rearranging of data, but this can easily realize by display control circuit TCON.
In addition, the liquid crystal indicator shown in Figure 1A～1C is configured in its light guide plate GLB than display panels PNL more by observer's one side.But, can certainly at the back side of display panels PNL, be configured in the place ahead of optical medium LM as shown in Figure 6.Because this can produce same effect.
, even the thickness of the liquid crystal indicator light guide plate GLB shown in Figure 1A～1C is bigger, also be difficult to the fuzzy of the light that is reflected, so can fully adapt to high resolving power.
Embodiment 2
Fig. 7 A is the cut-open view of other embodiment of expression liquid crystal indicator of the present invention, for example compares with Fig. 6, and be structure with optical medium LM and painted reflecting plate CRF.Because make and possessed each function that optical medium LM and painted reflecting plate CRF are had separately in the display panels PNL.
Fig. 7 B is the figure that the part of the pixel of this display panels PNL is taken as section.In addition, from observer's unilateral observation, light guide plate GLB is configured in the back side of this display panels PNL.
The structure of this display panels PNL structure with the display panels shown in Fig. 3 A basically is identical, but be provided with on color filter CF and the reflection horizon RF different.
At first, color filter CF for example is formed on the part of the pixel of the face of the liquid crystal side of transparency carrier SUB2 for example.In Fig. 7 B, become and on the face of the liquid crystal side of transparency carrier SUB2, form this color filter CF, cover the structure that this color filter CF ground is formed with opposite electrode CT.
In addition, reflection horizon RF is formed on the part of pixel of face of liquid crystal side of transparency carrier SUB1, forms with much at one pattern in the place relative with described color filter CF.In Fig. 7 B, on the face of the liquid crystal side of transparency carrier SUB1, form this reflection horizon RF, the upper surface at the dielectric film that covers the formation of RF ground, this reflection horizon is formed with pixel electrode PX.
The liquid crystal indicator of Gou Chenging is shown in Fig. 7 C like this, when light source LT opens, sees through the light from light source LT of transparency carrier SUB1, and liquid crystal LQ, the transparency carrier SUB2 in the zone by the above-mentioned reflection horizon RF of not forming of pixel arrive observer's one side.
From the light of above-mentioned light source LT, switch red, green, blue and shine of all kindsly successively, so even not by being formed on the color filter CF of transparency carrier SUB2 one side, the observer also can discern their colour mixture.
In addition, shown in Fig. 7 D, when light source LT closed, the ambient light of the sun etc. saw through transparency carrier SUB2, liquid crystal LQ, by being formed on the color filter CF of transparency carrier SUB2 one side, arrived the observer by the light of described reflection horizon RF reflection.At this moment, not by other light of above-mentioned reflection horizon RF reflection by display panels PNL, light guide plate GLB less than reaching the observer.
In addition, in said structure, the zone of color filter CF is about 1/2～2 times area of reflection horizon RF preferably.This is the painted inhibition when taking into account transmittance simultaneously and the high colour purity of reflex time.
At this moment, by based on the transmission form or based on reflected version, can suitably select the area ratio of reflection horizon RF according to its purpose with respect to pixel electrode PX.At this moment, the catoptrical influence when suppressing transmission, wish to be less than or equal to pixel electrode PX area 1/3.This is for fear of with respect to red, green, blue three looks, and the influence of catoptrical color is excessive.
Like this, when each pixel is provided with the color filter CF of 1 look, when light source LT opens, can realizes the demonstration of 3 looks with 1 pixel, and when light source LT closes, can realize the demonstration of 1 look with 1 pixel.
Therefore, shown in embodiment 1,, can when closing, light source constitute the colored unit picture element that shows usefulness by at least 3 pixels of adjacency being distributed the color filter of 3 primary colors.
In addition, the position of color filter CF if with reflection layer RF associated configuration in the plane, then can be arranged on the substrate identical with this reflection layer RF.
Fig. 8 A is a planimetric map of observing the pixel of Fig. 7 B from liquid crystal side.This pixel PIX is extended by x direction in the drawings and the signal line GL that is arranged side by side in the y direction and extend and surround at the drain signal line DL that the x direction is arranged side by side in the y direction and form.On the part of the side's of this pixel PIX signal line (below among the figure) GL, be formed with semiconductor layer SC via this signal line of not shown dielectric film crosscut GL ground, by providing sweep signal to this signal line GL, this semiconductor layer SC is formed with the thin film transistor (TFT) TFT of conducting from its end to end.
Be connected electrically on this pixel PIX one side's drain signal line (left side among the figure) DL at the end of this semiconductor layer SC, the other end is connected electrically on the pixel electrode PX.
Pixel electrode PX is formed on the major part of central authorities of the periphery of removing this pixel PIX, stipulates its periphery, makes distance with drain signal line DL than big with the distance of signal line GL.
Zone between pixel electrode PX and drain signal line DL is formed with reflectance coating RF, and limit and this pixel electrode PX of pixel electrode PX one side of this reflectance coating RF form overlappingly.As mentioned above, the area of this reflectance coating RF is roughly determined by the area of the color filter CF of transparency carrier SUB2 one side.
In addition, Fig. 8 B is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention, is the figure corresponding with Fig. 8 A.In addition, Fig. 8 C is the sectional view of the c-c line of Fig. 8 B.
Compare different structures with Fig. 8 A and be, join, form one near the reflectance coating RF of drain signal line DL ground configuration with the reflectance coating RF physics of other pixels PIX of this pixel PIX adjacency.Therefore, the reflectance coating RF that constitutes like this forms and has the part overlapping with drain signal line DL.
By such formation, near the both sides of the chest of drain signal line DL, can have shade function, can prevent the light leak of this part.
In addition, Fig. 8 D is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention, is the figure corresponding with Fig. 8 A.
Compare different structures with the situation of Fig. 8 A and be, above-mentioned reflectance coating RF is in the position with layer with signal line GL, and the one end also is electrically connected with signal line GL physical connection.
In the present embodiment, reflectance coating RF for example is connected with other signal lines GL that surrounds this pixel (the signal line of top among the figure) with the signal line GL that drives this pixel.At this moment, the limit of the pixel electrode PX side of reflectance coating RF is overlapping via not shown dielectric film and this pixel electrode PX, in this part, can form capacity cell Cadd between pixel electrode PX and above-mentioned signal line GL.
In addition, from then on set out, when the x direction forms the capacitance signal line in the drawings in pixel PIX, this capacitance signal line and above-mentioned reflectance coating RF are integrally formed.
In addition, Fig. 8 E is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention, is the figure corresponding with Fig. 8 B.
At this moment, described reflectance coating RF also be in and signal line GL with the position of layer, and the one end is with signal line GL physical connection and be electrically connected.
And this reflectance coating RF forms has the part overlapping with drain signal line DL, can have shade function near the both sides of the chest of drain signal line DL.
In addition, Fig. 8 F is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention, is the figure corresponding with Fig. 8 B.
In Fig. 8 B, reflectance coating RF and drain signal line DL are formed in the different layers, but in Fig. 8 F, with layer and form these reflectance coatings RF and drain signal line DL.
In view of the above, drain signal line DL can adopt the structure of holding a concurrent post reflection horizon RF, in addition, can reduce the resistance of drain signal line DL self.
And then Fig. 8 G is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention, is the figure corresponding with Fig. 8 C.
In Fig. 8 C, pixel electrode PX and reflectance coating RF are formed in the different layers via dielectric film, but in Fig. 8 G, adopt different material formation pixel electrode PX and reflectance coating RF, and they not via any dielectric film overlap to form.
When such formation,, can seek the reduction of the resistance of pixel electrode PX self by selecting the material of little this reflectance coating of the conduct RF of resistance.
Embodiment 3
Fig. 9 A is the planimetric map of other embodiment of the pixel of expression liquid crystal indicator of the present invention.
The pixel of this display panels PNL is extended and between the signal line GL that the y direction is arranged side by side in x direction in the drawings, and is located at the y direction and extends between the drain signal line DL that the x direction is arranged side by side.
In view of the above, in the pixel region that surrounds by each signal wire, be provided with 3 pixel electrode PX1, PX2, the PX3 that arranges in for example x direction.
Each pixel electrode PX1, PX2, PX3 and be configured in the signal line GL of top among the figure for example, be electrically connected with each end of the semiconductor layer SC1, the SC2 that dispose via not shown dielectric film crosscut, SC3, their other ends are public respectively to be connected, be configured in figure for example in the drain signal line DL on right side be electrically connected.Above-mentioned semiconductor layer SC1, SC2, SC3 are respectively the semiconductor layers of thin film transistor (TFT) TFT1, TFT2, TFT3, when when the signal line GL with its cross-over configuration provides sweep signal, be provided for each pixel electrode PX1, PX2, PX3 from the picture signal of drain signal line DL.
In addition, the zone between the signal line GL below each pixel electrode PX1, PX2, PX3 and the configuration in the drawings, the x direction is extended, has been arranged side by side 3 sub-scanning signal wire RL1, RL2, RL3 in the y direction in the drawings.
And, pixel electrode PX1 and above-mentioned sub-scanning signal wire RL1, being electrically connected via the end of the semiconductor layer SC4 of not shown dielectric film crosscut configuration, the drain signal line DL on right side is electrically connected the other end of this semiconductor layer SC4 with disposing in the drawings.Above-mentioned semiconductor layer SC4 is the semiconductor layer of thin film transistor (TFT) TFT4, when when the sub-scanning signal wire RL1 with its cross-over configuration provides signal, is provided for pixel electrode PX1 from the signal (black shows signal described later) of drain signal line DL.
Equally, pixel electrode PX2 and above-mentioned sub-scanning signal wire RL2, be electrically connected via the end of the semiconductor layer SC5 of not shown dielectric film crosscut configuration, the drain signal line DL on right side is electrically connected the other end of this semiconductor layer SC5 with disposing in the drawings.Above-mentioned semiconductor layer SC5 is the semiconductor layer of thin film transistor (TFT) TFT5, when when the sub-scanning signal wire RL2 with its cross-over configuration provides signal, is provided for pixel electrode PX2 from the signal (the black shows signal of describing later) of drain signal line DL.
Equally, pixel electrode PX3 and above-mentioned sub-scanning signal wire RL3, be electrically connected via the end of the semiconductor layer SC6 of not shown dielectric film crosscut configuration, the drain signal line DL on right side is electrically connected the other end of this semiconductor layer SC6 with disposing in the drawings.Above-mentioned semiconductor layer SC6 is the semiconductor layer of thin film transistor (TFT) TFT6, when when the sub-scanning signal wire RL3 with its cross-over configuration provides signal, is provided for pixel electrode PX3 from the signal (the black shows signal of describing later) of drain signal line DL.
The display panels PNL of Gou Chenging is shown in Fig. 9 B like this, for its pixel PIX, have pixel electrode PX1, PX2, the PX3 of all kinds of being responsible for, on painted reflecting plate CRF, relatively be formed with red color filter FIL, green color filter FIL, blue color filter FIL with pixel electrodes PX1.
In addition, this display panels PNL disposes light guide plate GLB on the face of this observer's one side shown in Fig. 9 C, disposes optical medium LM, painted reflecting plate CRF overleaf successively, constitutes liquid crystal indicator.
The liquid crystal indicator of Gou Chenging is when light source LT opens like this, sub-scanning signal wire RL1, sub-scanning signal wire RL2, sub-scanning signal wire RL3 always are blocked, via by from the providing of sweep signal of signal line GL and driven thin film transistor (TFT) TFT1, TFT2, TFT3 provide picture signal to pixel electrode PX1, PX2, PX3 respectively from drain signal line DL.
In addition,, provide the GTG signal of the GTG signal of the GTG signal of red usefulness, green usefulness, blue usefulness successively,, switch redness, green, blue each light ground incident successively from the light of light guide plate GLB according to this as picture signal at this moment.In addition, in pixel electrode PX1, PX2, PX3, all similarly see through or reflection from the light of light guide plate GLB, the observer with by colour mixture state discern each light from this pixel.
In addition, when light source closes, according to make this pixel shown in red successively → timing of green → blueness, at first, when red display, GL writes pixel electrode PX1, PX2, PX3 to data by the signal line, then, to drain signal line DL input black data, and make sub-scanning signal wire RL2, sub-scanning signal wire RL3 conducting, make pixel electrode PX2, PX3 part be shown as black.In view of the above, the part of pixel electrode PX1 is shown in red.
Then, when green shows, by signal line GL data are write among pixel electrode PX1, PX2, the PX3, then, to drain signal line DL input black data, and make sub-scanning signal wire RL1, sub-scanning signal wire RL3 conducting, make pixel electrode PX1, PX3 part be shown as black.In view of the above, the part of pixel electrode PX2 is shown in green.
Then, when blueness shows, by signal line GL data are write among pixel electrode PX1, PX2, the PX3, then, to drain signal line DL input black data, and make sub-scanning signal wire RL1, sub-scanning signal wire RL2 conducting, make pixel electrode PX1, PX2 part be shown as black.In view of the above, the part of pixel electrode PX2 is shown in red.
By like this, the resolution of demonstration is not reduced, the observer can discern reflection of all kinds and show.
Figure 10 A is illustrated in the above-mentioned liquid crystal indicator, to drain signal line DL provide picture signal, to signal line GL sweep signal is provided, to sub-scanning signal wire RL1, sub-scanning signal wire RL2, each sequential chart that shows of pixel electrode PX1, pixel electrode PX2, pixel electrode PX3 when sub-scanning signal wire RL3 provides each signal.The timing that provides of each signal of this sequential chart as mentioned above.TR is during R shows, TG is during G shows, TB is during B shows.In addition, PR only represents the Zone R territory, and PG only represents the G zone, and PB only represents the B zone.
In addition, the situation that different signals provided when Figure 10 B represented to carry out with Figure 10 A, compare with the situation of Figure 10 A, the rising of each signal that provides to sub-scanning signal wire RL1, sub-scanning signal wire RL2, sub-scanning signal wire RL3 is consistent with the sweep signal that provides to signal line GL, and the decline of each signal that provides to sub-scanning signal wire RL1, sub-scanning signal wire RL2, sub-scanning signal wire RL3 is after the decline of the sweep signal that provides to signal line GL.
At this moment, the zone beyond the color that can show with shorter time chien shih is a black, so can seek the further raising of excitation.
Embodiment 4
Figure 11 A is the planimetric map of other embodiment of the pixel of the above-mentioned display panels PNL of expression, is the figure corresponding with Fig. 9 A.
Comparing different structure with the situation of Fig. 9 A is, with for example provide the drain signal line DL of picture signal that the black special-purpose auxiliary image signal line RD that writes is set in abutting connection with ground to this pixel, via by the film transistor 4 of sub-scanning signal wire RL1 conducting, by the film transistor 5 of sub-scanning signal wire RL2 conducting, by the film transistor 6 of sub-scanning signal wire RL3 conducting, provide black signal from this auxiliary image signal line RD to each pixel electrode PX1, PX2, PX3.
By adopting such structure, the signal that can not change so-called field-sequential method mode in the past constitutes with writing.Can be provided for the black current potential that shows to auxiliary image signal line RD, for example when often deceiving pattern, the current potential, the so-called common potential that provide to opposite electrode CT are provided be got final product.
Figure 10 B is illustrated among the display panels PNL with above-mentioned pixel, to drain signal line DL provide picture signal, to signal line GL provide sweep signal, to auxiliary image signal line RD signal is provided, to sub-scanning signal wire RL1, sub-scanning signal wire RL2, the figure of each sequential that shows of pixel electrode PX1, pixel electrode PX2, pixel electrode PX3 when sub-scanning signal wire RL3 provides each signal.
Embodiment 5
Figure 12 A is the planimetric map of other embodiment of the pixel of the above-mentioned display panels PNL of expression.
The same with the foregoing description, a pixel has pixel electrode PX1, the PX2, the PX3 that are arranged side by side with adjoining each other in this pixel between the drain signal line DL of configuration., difference is to have the signal line GL1, GL2, the GL3 that are used for driving independently respectively each pixel electrode PX1, PX2, PX3.
That is, via thin film transistor (TFT) TFT1, provide picture signal from for example drain signal line DL in left side that is positioned at this pixel to pixel electrode PX1, this thin film transistor (TFT) TFT1 is by from the sweep signal of signal line GL1 and conducting.In addition, via thin film transistor (TFT) TFT2, provide picture signal from above-mentioned drain signal line DL to pixel electrode PX2, this thin film transistor (TFT) TFT2 is according to the sweep signal conducting from signal line GL2.Via thin film transistor (TFT) TFT3, provide picture signal from above-mentioned drain signal line DL to pixel electrode PX3, this thin film transistor (TFT) TFT3 is according to from the sweep signal of signal line GL3 and conducting.
By adopting such structure, compare with above-mentioned dot structure, can reduce the quantity of wiring.
Figure 12 B is illustrated among the display panels PNL of the pixel with said structure, when its reflective-mode to drain signal line DL picture signal is provided, to signal line GL1, signal line GL2, each sequential chart that shows of pixel electrode PX1, pixel electrode PX2, pixel electrode PX3 when signal line GL3 provides sweep signal.
Pixel electrode PX1, pixel electrode PX2, pixel electrode PX3 are along with the process of time, switch red display respectively, green show, the blue demonstration, but at this moment, in a pixel electrode, carry out this demonstration after, before next pixel electrode shows, deceive demonstration.
That is,, provide sweep signal to signal line GL1, GL2, GL3 simultaneously respectively deceiving when showing, by for example red, green, when blue order is switched successively, picture integral body is write black.
In view of the above, remove the electric charge that is stored in the color among each pixel electrode PX1, PX2, the PX3, can prevent colour mixture.
And then, at this moment can be with each signal line GL of sequential scanning display panels PNL from top to bottom for example in scheming, but the demonstration time of color is different up and down picture, so can be shown in Figure 12 C, make with frame unit or multiframe unit from the top down the scan condition from bottom to top shown in scan condition and Figure 12 D mix and exist.
In view of the above, can make the brightness equalization in the picture, it is inhomogeneous to reduce demonstration.
Each above-mentioned embodiment can use alone or in combination.Because can obtain the effect among each embodiment alone or in combination.
In addition, above-mentioned liquid crystal indicator does not limit the object that it is installed, but preferably is applicable to the picture portion of mobile phone such shown in PDA such shown in Figure 12 A (Personal Digital Assistant) or Figure 12 B.This is small-sized because of PDA and mobile phone, thus more in the chance of outdoor application, can use ambient lights such as the sun as light source.
From above explanation as can be known,, do not have the actuating mechanism of machinery, in view of the above, can realize high reliability and miniaturization according to liquid crystal indicator of the present invention.

Claims (10)

1. liquid crystal indicator is characterized in that:
Begin to dispose at least successively light guide plate, display panels, the optical medium that pass through and reflect of switches light, color filter, the reflecting plate of guiding from observer's one side from the light of light source,
Above-mentioned light from light source is switched successively is responsible for the trichromatic of all kinds of color, by behind the above-mentioned display panels, reflexes to observer's one side by above-mentioned optical medium,
And above-mentioned color filter is made of color filter trichromatic of all kinds relative respectively with 3 pixels that adjoin each other of display panels, that be responsible for color at least,
Said reflection plate makes the ambient light that passes through via above-mentioned light guide plate, display panels, optical medium and color filter reflex to observer's one side.
2. liquid crystal indicator according to claim 1 is characterized in that:
Above-mentioned color filter is formed on the described reflecting plate face.
3. liquid crystal indicator according to claim 1 is characterized in that:
Have display control circuit, judge the Kai Heguan of above-mentioned light source by this display control circuit; When this light source is opened,, each pixel is provided the picture signal of corresponding color according to switching from the light of all kinds of this light source; When above-mentioned light source closes, provide picture signal respectively corresponding to the color of the color of the color filter of relative configuration with it at least 3 that adjoin each other above-mentioned pixels.
4. liquid crystal indicator according to claim 3 is characterized in that:
When described light source is opened, carry out data between get, low when resolution is closed than light source.
5. liquid crystal indicator is characterized in that:
From observer's one side begin to dispose at least successively guiding from the optical medium that passes through and reflect of the light guide plate of the light of light source, display panels, switches light, be responsible for color filter, the reflecting plate trichromatic of all kinds of color,
Above-mentioned light source is by the light that sends from it that switches successively trichromatic of all kinds of being responsible for color,
Above-mentioned display panels is divided into 3 the of all kinds relative pixel regions with above-mentioned color filter in its each pixel,
And having to each pixel provides the parts of picture signal simultaneously and the parts of black shows signal is provided independently to each pixel region.
6. liquid crystal indicator according to claim 5 is characterized in that:
Provide picture signal via image signal line to each pixel region, black shows signal provides via this image signal line.
7. liquid crystal indicator according to claim 5 is characterized in that:
When from above-mentioned light source luminescent, do not provide black shows signal to each pixel region, when from above-mentioned light source when not luminous, after providing picture signal to each pixel region, other residual pixel zones beyond the corresponding pixel region of the color of being responsible for this picture signal provide black shows signal.
8. liquid crystal indicator according to claim 5 is characterized in that:
Provide picture signal via image signal line to each pixel region, provide black shows signal via the signal wire that differently is provided with this image signal line.
9. liquid crystal indicator is characterized in that:
From observer's one side begin to dispose at least successively guiding from the optical medium that passes through and reflect of the light guide plate of the light of light source, display panels, switches light, be responsible for color filter, the reflecting plate trichromatic of all kinds of color,
Above-mentioned light source is by the light that sends from it that switches successively trichromatic of all kinds of being responsible for color,
Above-mentioned display panels is divided into 3 the of all kinds relative pixel regions with above-mentioned color filter in its each pixel,
Respectively via because of the 1st thin film transistor (TFT) that drives that provides from the sweep signal of the 1st signal line, via because of the 2nd thin film transistor (TFT) that drives that provides from the sweep signal of the 2nd signal line, via because of the 3rd thin film transistor (TFT) that drives that provides, provide picture signal from the same drain signal wire to each pixel electrodes of these pixel regions from the sweep signal of the 3rd signal line.
10. liquid crystal indicator according to claim 9 is characterized in that:
Comprise black shows signal in the above-mentioned picture signal, switch successively and carry out the demonstration separately of each pixel region, and when these switch, carry out black demonstration based on this black shows signal.
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US7639324B2 (en) 2009-12-29
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US20040239830A1 (en) 2004-12-02
JP4170121B2 (en) 2008-10-22

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